FOD420S

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The FOD420S is an optoisolator, whose main purpose is to isolate the input signal from the output circuit, providing an effective means for protecting the circuits connected to the isolator. One of the key features of the FOD420S is its high-output current capability, rated at 20 mA when operating with a 3.3V DC input voltage.

In the field of optoisolators, the FOD420S is classified as a Triac, SCR Output. This optoisolator contains an integrated circuit (IC) with an output transistor for driving triacs and SCRs as well as pulse transformers for controlling the devices. The optoisolator is capable of providing a low-level DC, AC, or pulse trigger signal to actuate the output device, providing better isolation performance than is possible with direct-coupled AC or DC trigger signals.

The working principle of the FOD420S optoisolator is based on the light-emitting diode (LED). When a control voltage is applied to the LED, it emits light, which is transferred to the output transistor through an optical path. This in turn activates the output transistor, driving the triac, SCR, or pulse transformer that is connected to the output. The FOD420S has a typical turn-on and turn-off time of 7µs and 25µs respectively. Furthermore, the optoisolator is capable of operating over a wide range of temperatures and frequencies.

The FOD420S is typically used in applications such as AC line phase-control, light-dimmer applications, relay switch/control, building automation, and motor control. The high-voltage capability of the FOD420S enables it to handle up to 500V AC. The optoisolator also provides a safe path for switch-on/switch-off operation. The wide operating range and high isolation voltage make the FOD420S an ideal choice for applications that require quick response time, high accuracy, and superior reliability.

The FOD420S optoisolator is an efficient and reliable means of providing isolation between circuits, allowing it to be used in a wide variety of applications where very high isolation is needed. The optoisolator is also capable of handling up to 500V AC, making it capable of providing the protection required for sensitive circuits and other components. The high-output current capability and wide operating range of the FOD420S makes it an ideal choice for applications demanding high performance and superior reliability.

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